REHNE SENSE A3a ON-OFF Laboratory Micromotor
The REHNE SENSE A3a sits between two worlds. It’s a carbon brush motor, so the tactile feel and straightforward maintenance that technicians are used to are still there. But the design borrows heavily from the A3 brushless series — the ergonomics, the power delivery, the overall build quality. For labs that want something that looks and performs like a premium unit without giving up the familiarity of carbon brush technology, the A3a makes a strong case for itself.
| Product Code | 434/00 |
| Motor Type | Advanced Carbon Brush |
| Power | 70 Watt |
| Speed Range | 1,000 – 35,000 RPM |
| Maximum Torque | 3.0 Ncm |
| Control | ON-OFF Foot Pedal |
| Price | € 385.00 (Regular) | € 269.00 (Sale) |
Power steps up to 70W on this model, with torque sitting at 3.0 Ncm. That extra wattage keeps the rotation stable across the full 1,000 to 35,000 RPM range — no drop-off at the extremes. The operation is noticeably smoother than standard lab motors, which shows up most during detailed work where consistency matters. It’s not quite entry-level and not quite high-end specialist equipment either. It sits comfortably in between, which is exactly where a lot of technicians want to be.
The control box has been redesigned — smaller than previous versions and cleaner on the bench. The handpiece that comes with it has a better balance to it, and the grip is more comfortable during long sessions. Activation is handled through a standard ON-OFF foot pedal, so the motor kicks in at whatever speed you’ve preset and stays there. The “Sense” technology built into the motor improves feedback during use, which makes a difference when you’re doing precise work. Modern internals, familiar operation.

